What version of Action! are you using?

Tried this with Apex and it seems smoother than Game Mode.

I'm using Action! 4.38.0 to record gameplay of games like Valorant, CS2, and GTA V. It used to be smooth, but recently when I record at 1920x1080 @ 60fps, the video often stutters, drops frames, or is out of sync with the audio and video. My PC specs: CPU: Ryzen 5 5600X GPU: RTX 3060 RAM: 32GB 1TB N...

Try converting the video format from AVI to MP4 and enabling hardware acceleration (Intel Quick Sync or NVIDIA NVENC) in the settings.